Initial commit

1 files changed, 56 insertions, 0 deletions

diff --git a/shaders/vshader.vsh b/shaders/vshader.vsh
new file mode 100644
index 0000000..e592d0b
--- /dev/null
+++ b/shaders/vshader.vsh
@@ -0,0 +1,56 @@
+attribute highp vec4 a_Vertex;
+attribute highp vec4 a_Color;
+attribute highp vec3 a_Normal;
+attribute highp vec2 a_TexCoord;
+
+uniform bool u_LightingEnabled;
+uniform bool u_ColorArrayEnabled;
+uniform highp mat4 u_MvpMatrix;
+uniform highp mat3 u_NormalMatrix;
+uniform highp vec3 u_LightDirection;
+uniform highp vec3 u_HalfPlaneVector;
+uniform highp vec4 u_AmbientAndDiffuseColor;
+uniform highp float u_AmbientLightBrightness;
+uniform highp vec4 u_SpecularColor;
+uniform highp float u_Shininess;
+uniform int u_PointSize;
+
+varying highp vec2 v_TexCoord;
+varying highp vec4 v_AmbientAndDiffuseColor;
+varying highp vec4 v_SpecularColor;
+varying highp float v_AmbientLightBrightness;
+varying highp float v_DiffuseBrightness;
+varying highp float v_SpecularBrightness;
+
+const highp float c_Zero = 0.0;
+highp vec3 eyeSpaceNormal;
+
+highp float calculateDiffuseBrightness()
+{
+    if(u_LightingEnabled)
+       return max(c_Zero, dot(eyeSpaceNormal, u_LightDirection));
+    else return 1.0;
+}
+
+highp float calculateSpecularBrightness()
+{
+    highp float nDotHp = max(c_Zero, dot(eyeSpaceNormal, u_HalfPlaneVector));
+    if(u_LightingEnabled && nDotHp > c_Zero)
+       return pow(nDotHp, u_Shininess);
+    else return 0.0;
+}
+
+void main(void)
+{
+    gl_Position = u_MvpMatrix * a_Vertex;
+    if(u_LightingEnabled)
+      eyeSpaceNormal = normalize(u_NormalMatrix * a_Normal);
+    v_TexCoord = a_TexCoord;
+    if(u_ColorArrayEnabled)
+       v_AmbientAndDiffuseColor = a_Color;
+    else v_AmbientAndDiffuseColor = u_AmbientAndDiffuseColor;
+    v_AmbientLightBrightness = u_AmbientLightBrightness;
+    v_DiffuseBrightness = calculateDiffuseBrightness();
+    v_SpecularColor = u_SpecularColor;
+    v_SpecularBrightness = calculateSpecularBrightness();
+}